How Have i ended up with over 67GB worth of files on a 32GB playbook?

My 32GB playbook is getting rather full, so I decided to copy all files to my laptop in preparation for a change to a 64GB... when I copied everything over, the laptop shows 67.1 Gb of files... on the Playbook there is a folder called misc... within this is a folder marked android and there seems to be a duplicate of every file I have placed on the playbook. I know this can't be right, so what's happening?

If you do copy files from the Misc folder, you have to be very deliberate. Your regular photos, music, videos, etc will be in there and copied again. But there will be unique files, too created by Android apps.

The files in the misc directory are basically symbolic links to the real files in the real folders..
While copying over to the PC the links get resolved and the files get copied again making it seem like they are duplicated..